Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 150

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Code Error
551 Undervoltage
Additional information about causes and remedy:
The pump is running. Undervoltage reduces the pump output.
If the voltage falls below 160 V, the reduced operation cannot be maintained.
552 There is externally generated
flow through the pump in the
direction of flow.
Additional information about causes and remedy:
The pump can start despite flow.
553 Electronic module is defective. Electronic module is defec-
Additional information about causes and remedy
The pump is running, but cannot provide full power under the circumstances.
Contact service.
1)
554 MFA pump is not reachable.
Additional information about causes and remedy
1)
In the MFA
The supply is ensured, a substitute value is assumed.
555 No plausible sensor value at
analog input AI 1.
Additional information about causes and remedy:
Incorrect sensor values may lead to substitute operation modes that ensure the pump functions
without the required sensor value.
556 Cable break at analog input
AI 1.
Additional information about causes and remedy:
Cable break detection may lead to substitute operating modes that ensure functioning of the
pump without the required external value.
557 No plausible sensor value at
analog input AI 2.
Additional information about causes and remedy:
Incorrect sensor values may lead to substitute operation modes that ensure the pump functions
without the required sensor value.
558 Cable break at analog input
AI 2.
Additional information about causes and remedy:
Cable break detection may lead to substitute operating modes that ensure functioning of the
pump without the required external value.
150
Cause
Power supply has dropped
below 195 V.
External influences cause
flow in the pump's direc-
tion of flow.
tive.
An MFA
longer reacts to requests.
overview, check the pump highlighted with (!).
The configuration and the
present signal lead to an
unusable sensor value.
The configuration and the
present signal help identify
the cable break.
The configuration and the
present signal lead to an
unusable sensor value.
The configuration and the
present signal help identify
the cable break.
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
Remedy
Check power supply.
Check power control of the other
pumps.
Replace electronic module.
1)
partner pump no Check Wilo Net connection or
power supply of the partner
pump.
Check configuration of the input
and connected sensor.
Check configuration of the input
and connected sensor.
Check configuration of the input
and connected sensor.
Check configuration of the input
and connected sensor.